Geometrical progressions give rise to numbers which can be extremely large. One of the large numbers arising from geometric progressions is the number of grains of corn that can be placed on a chessboard.
According to legend, a man named Sessa invented the game of chess and presented it to the king. The king was so pleased that he promised to reward Sessa with whatever he asked for. Sessa asked for a grain of corn for first of 64 squares of his chessboard, 2 grains for second, 4 for third, 8 for fourth and so on, doubling the number of grains in each square up to last.
The king agreed to Sessa’s request without hesitation. Sessa showed the king that he could never grant his request no matter how rich the king was.
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